Academic literature on the topic 'Topologie de courbe singulière'
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Journal articles on the topic "Topologie de courbe singulière":
Brisac, Antoine. "Temps et topologie des mondes." Cahiers philosophiques N° 174, no. 3 (January 5, 2024): 59–79. http://dx.doi.org/10.3917/caph1.174.0061.
Corral, Nuria. "Sur la topologie des courbes polaires de certains feuilletages singuliers." Annales de l’institut Fourier 53, no. 3 (2003): 787–814. http://dx.doi.org/10.5802/aif.1960.
Nishino, Toshio. "Sur les points singuliers d'une courbe analytique." Hiroshima Mathematical Journal 16, no. 3 (1986): 631–38. http://dx.doi.org/10.32917/hmj/1206130315.
Ayada, Souâd. "Philosophie en Islam." Revue philosophique de la France et de l'étranger Tome 149, no. 1 (December 1, 2023): 3–15. http://dx.doi.org/10.3917/rphi.241.0003.
Maugendre, Hélène. "Topologie comparée d'une courbe polaire et de sa courbe discriminante." Revista Matemática Complutense 12, no. 2 (January 1, 1999). http://dx.doi.org/10.5209/rev_rema.1999.v12.n2.17149.
Dissertations / Theses on the topic "Topologie de courbe singulière":
Krait, George. "Isolating the Singularities of the Plane Projection of Generic Space Curves and Applications in Robotics." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0092.
Isolating the singularities of a plane curve is the first step towards computing its topology. For this, numerical methods are efficient but not certified in general. We are interested in developing certified numerical algorithms for isolating the singularities. In order to do so, we restrict our attention to the special case of plane curves that are projections of smooth curves in higher dimensions. This type of curves appears naturally in robotics applications and scientific visualization. In this setting, we show that the singularities can be encoded by a regular square system whose solutions can be isolated with certified numerical methods. Our analysis is conditioned by assumptions that we prove to be generic using transversality theory. We also provide a semi-algorithm to check their validity. Finally, we present experiments in visualization and robotics, some of which are not reachable by other methods, and discuss the efficiency of our method
Diatta, Daouda Nang. "Calcul effectif de la topologie de courbes et surfaces algébriques réelles." Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/3df888a0-6523-4fdc-a7f0-d004e1e26604/blobholder:0/2009LIMO4072.pdf.
In this thesis, we got interested into the Effective Computation of the Topology of Real Algebraic Curves and Surfaces. One can distinguish three main new algorithms in the field of shape representation. Our first algorithm is a certified symbolic-numerical based on sub-resultants properties and computes the topology of a plane algebraic curve with the best known complexity. The second algorithms computes the topology of a space curve defined as the intersection of two implicit algebraic surfaces. For the designing of this algorithm, we introduce the notion of space curve in pseudo-generic position with respect to a given plane. This approach leads to a certified symbolic-numerical algorithm with the best known complexity. The third algorithms is a new and complete one for computing the isotopic meshing of an implicit algebraic surface. It involves only subresultant computations and entirely relies on rational manipulation, which makes it direct to implement. Finally, we also design an algorithm for computing the cells in an arrangement of quadrics which may be classify on the area of configuration spaces computation
Bouzidi, Yacine. "Résolution de systèmes bivariés et topologie de courbes planes." Phd thesis, Université de Lorraine, 2014. http://tel.archives-ouvertes.fr/tel-00979707.
Bouzidi, Yacine. "Résolution de systèmes bivariés et topologie de courbes planes." Electronic Thesis or Diss., Université de Lorraine, 2014. http://www.theses.fr/2014LORR0016.
A fundamental problem in computational geometry is the computation of the topology of an algebraic plane curve given by its implicit equation, that is, the computation of a graph lines that approximates the curve while preserving its topology. A critical step in many algorithms computing the topology of a plane curve is the computation of the set of singular and extreme points (wrt x) of this curve, which is equivalent to the computation of the solutions of bivariate systems defined by the curve and some of its partial derivatives. In this presentation, we study form theoretical and practical perspectives the problem of solving systems of bivariate polynomials with integer coefficients. More precisely, we investigate the computation of a Rational Univariate Representation (RUR) of the solutions of a bivariate system, that is, a one-to-one mapping that sends the roots of a univariate polynomial to the solutions of the bivariate system. We first present a theoretical algorithm for computing the RUR of a bivariate system that improves the best complexity bound for this problem by a factor d^2 where d denote the degree of the input polynomials and allows to derive a new bound on the size of the polynomials of the RUR. We then present an algorithm for computing a RUR that is efficient in practice. This algorithm, based on some random choices and the use of multi-modular computation is probabilistic. We first present a Monte-Carlo variante of this algorithm, and then show how to transforme the latter into a Las-Vegas algorithm by checking the result for correctness. The complexity analysis as well as the experiment we performed show the efficiency of this algorithm
Osta, Sébastien. "Développement de méthodes topologiques pour la détermination de la courbe de distillation (T. B. P. ) de pétroles bruts, à l'aide de la spectroscopie proche infrarouge." Aix-Marseille 3, 1995. http://www.theses.fr/1995AIX30091.
Crude oil constitutes a significant part of wealth of the modern economy. Several million tonnes are treated each year in the principal refinery unit, the atmospheric distillation, therefore, real time optimisation of the distillation unit represents a true economic gain, however, classical methods for crude oil analysis are long and complex, near infrared coupled with suitable mathematical modelling techniques permits on-line prediction of the true boiling point (T. B. P. ), and allows anticipatory adjustement of operating parameters. A topological modelling approach, based on a nearest neighbours concept, presents a major advantage self learning method
Bardet, Alexandre. "Diviseurs sur les courbes réelles." Phd thesis, Université d'Angers, 2013. http://tel.archives-ouvertes.fr/tel-00879645.
Diatta, Daouda. "Calcul effectif de la topologie de courbes et surfaces algébriques réelles." Phd thesis, Université de Limoges, 2009. http://tel.archives-ouvertes.fr/tel-00438817.
Iezzi, Annamaria. "Nombre de points rationnels des courbes singulières sur les corps finis." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4027/document.
In this PhD thesis, we focus on some issues about the maximum number of rational points on a singular curve defined over a finite field. This topic has been extensively discussed in the smooth case since Weil's works. We have split our study into two stages. First, we provide a construction of singular curves of prescribed genera and base field and with many rational points: such a construction, based on some notions and tools from algebraic geometry and commutative algebra, yields a method for constructing, given a smooth curve X, another curve X' with singularities, such that X is the normalization of X', and the added singularities are rational on the base field and with the prescribed singularity degree. Then, using a Euclidian approach, we prove a new bound for the number of closed points of degree two on a smooth curve defined over a finite field.Combining these two a priori independent results, we can study the following question: when is the Aubry-Perret bound (the analogue of the Weil bound in the singular case) reached? This leads naturally to the study of the properties of maximal curves and, when the cardinality of the base field is a square, to the analysis of the spectrum of their genera
Ivanovski, Dimce. "Résolution à l'infini et courbes polaires affines : quotients polaires à l'infini." Toulouse 3, 2006. http://www.theses.fr/2006TOU30211.
Girard, Marie. "Sur les courbes invariantes par un difféomorphisme C1-générique symplectique d’une surface." Thesis, Avignon, 2009. http://www.theses.fr/2009AVIG0406/document.
Poincaré and Birkhoff were led, during their research on the restricted problem of three bodies, to study invariant curves under an area preserving map of a surface. Fifty years later, theorems KAM show the persistance of invariant curves in topology Ck with k greater or equal to three. What becomes this result in topology class lower. Moreover, the study of C1-generic dynamics knows many developments particulary through the Connecting Lemma. For example, Bonatti and Crovisier showed a C1-generic symplectic diffeomorphism of a compact surface is transitive. What they have adapted with M.-C. Arnaud to a non compact surface : a C1-generic symplectic diffeomorphism of a non compact surface has a dense set of points whose orbit leaves every compacts. These two results suggest a such application has not an invariant simple closed curve. The proof of this result is the aim of this work. We obtain, using the Connecting Lemma, a C1-generic symplectic diffeomorphism has periodic points on all the invariant curves. Then, deleting the periodic points from the invariant curves is the challenge. At first, we use an argument that Herman used in the context of curves invariant by a twist of annulus, to show that all periodic points cannot be hyperbolic. Then, we define a property, the property G, which, if it is verified by a symplectic diffeomorphism and one of its periodic elliptic points, prevents this periodic point belongs to an invariant curve. By showing that property is verified by a C1-generic symplectic diffeomorphism, we obtain the desired result. In the fourth chapter, we explain how to pertube a symplectic diffeomorphism with generating functions